Le 2020-11-22 à 06:02, M�tes a écrit :
> Hi Yadgar,
> 
> the original pictures are all 8-bit greyscale, and to convert them into 16-bit
> didnt help. I want to ask a co-worker if there are some Gimp-Filters to better
> them, maybe that helps. At them moment there are only 265 steps in height, hope
> that I can smooth them a littlebit.
> 

Converting an 8-bit image to 16-bits can't help. All it can do is append 
8 zeros as low order bits.
You need some more steps to interpolate smoothly between the original steps.

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